#!/bin/sh
# $Id: mp3rename,v 1.1 2017/07/15 01:36:13 friedman Exp $

for f in "$@"; do
    case $f in
        */* ) dir=${f%/*}/ base=${f##*/} ;;
        *   ) dir= base=$f ;;
    esac

    ext=${f##*.}
    #fmt="General;%Performer% - %Album% (Disc %Part/Position% of %Part/Position_Total%) - %Track/Position% - %Track%.$ext"
    fmt="General;%Performer% - %Album% - %Track/Position% - %Track%.$ext"
    new=`mediainfo --Output="$fmt" "$f" \
            | sed -e 's/ - \([0-9]\) - / - 0\1 - /' \
                  -e 's/\//_/g'`
    case "$new" in "$base" ) continue ;; esac
    echo \""$f"\" "=>" \""$dir$new"\"
    mv -i "$f" "$dir$new"
done | fmtcols -s '=>' -S '=>'

# eof